Process of reclaiming pulp from waste water.



PATENTED AUG. 14, 1906.v

H. PARKER. PROCESS 0F REGLAIMNG PULP FROM WASTE WATER:

. A uw lm,

APPLIGATION FILED APB.17, .1901?.

- but it isvof the same value when used in con- 'chine is dependent to a very large extent on During the process of making ,turned to the head of the machine l HOW ARD PARKER, @E NASHUA,

IMPlItOVED PAPER lwlAClilN ERF( UUMPAYY, Ol? (L'XSTD E, Melilli), AND NASHUA, NEW l-YMPSlllllE A UOhPORf-X'YIN OF MAINE.

PROCESS 0F RGLNHNG PULP FROM WASTE WATER.,

no. sespoo.

Specification of Letters `Patent.

Application filed April 17,

To UZ whom. 1'! muyconcern: V

Be it known that I, HOWARD PARKER, a citizen of the United States of America, re siding at Nashua, in the county or Hillsboro and State of New Hampshire, have invented certain new and useful Improvements in Processes kof Reclaiming Pulp from W aste VVateiyo'Which the 'following is a specifica tion. l,

My invention relates to a novel process by means oi' which the particles oi' stock which escape during the operation of apaper-mak-A ing machine in What is known as the White Water and. also such stock is Washed from the yielts may be reclaimed, reduced auto matically to any desired density, and reto be again flooded onto the Wire.

-The drawing showsen arrangement of apparatus suitable for the carrying out oi my process.

The process is illustrated and will be described as applied to a Fourdrinier machine;

neotion With a cylindermachine` At the present' time in paper-making machinery the loss of stock which is carried olf by What is termed White Water amounts to about fifteen per cent. As is Well known, the character of the paper produced on a mathe condition, and particularly the density, of the'stock as it isiurnished to the. machine. An variation in the density of the stock iurnis ed 4will show an e ual variation :in the material produced, so t iat in running a maf chine in the manufacture of aL certain grade lof aper it is essential that the density of the .pu as it is 'Hooded onto the machine shall be main-tained constant.

paper a cern tain amountfof'stock is Washed from the machine onto the loor and ci rried oil' With what is called the Whitewaten This White Water cannotbe run back into the dow-tank of" the machine, as it would. alter the density of f the stock in the How-tank and have. a consequent eiect on the aper being made'. i It has been customary eretofore to pass this white Water oft' tlujoug'.` conduits into the Waste, and in this Way a out iifteen per cent; of the stock Was lost.

l By following out my process l am able to save avery considerable part, if not all, of the fifteen per cent. of Waste and return the reclaimed stock to the flow-box or other apparatus at the head of the machine at its original density, or it may be delivered to a supply-tank at any required density at which the stock may be pumped automatically, and the machine may be so regulated as to produce the stock always of a uniform test recles of fiber in the white Water;

Reierring;r to the drawing, a Fourdrinier machine is indicated in a general Way at A, located overa pit A', into which runs the -Which pass through thewire and are Whipped "oil the ielts. An outlet from the pit is ,rovided through the spout B, through W 'ch the white Water passes to a strainingylinder C, which removes foreign substances,such as sticks, rags, &c, Any suitable straining apparatus will do. From the' strainingcylin er the vWhite Water passes through the' pipe C- to the tank D, in which is mounted a cylinder-mold E, which collects and dries the stock density atwhich it Was floodedl onto the Fourdrinier Wire. The reclaimed pulp is new delivered from the mold to the receivingvat R, and from there it is forced back by suitable devices, as the pump G,to the proper apparatus at the head of the machine pre-v paratory to being ilooded onto then/ire aga-in. This apparatus at the head of, the

engine, or the reclaimed stock may be passed directly to the flow-bon, from which it iloWs onto the paper-making;l screen, or it may be kept in storage ready to be used when desired. l prefer to use a cylinder-mold-sub stantially like that shown in my Patent No.

with the doctorfshown therein.

When it is necessary for-any reason to stopthefelt of a paperqnaking machine, (in connection With a Fourdrinier n1achine,) it lis customary to allow the stock to run onto the lhourdrinier Wire and trom there onto the the flow-box or storage-tank. In machines gardless of the variation in density or parti-` lWhite Water carrying the particles of stock.

in the White Water, .reducing'it to its original machine may be a beating-engine or refining,

693,354, of February i1, 1902; in connection IOC floor underneath the machine and back to` equipped With the apparaths for carrying out product.

`n will be geen that by allowing out the process as herein. described and set forth the steps of the process take place in regula'rsucl cession in a circle from and back to the head of 'the machine and .that a considerable percentage of the stock which had hitherto been entirely lost is now practically all reclaimed and' returned to the'head of the machine in the same condition in which it originally was supplied.

claim as my inventionl. The hereindescribed process for re claiming stock from White Water which consists in continuously collecting the stock from the z-iyhite' Water, constantly reducing the stock so collected to a degree of density denitely related to the condition of the stock fed at the head of the machine, and returning so collected and condensed to the head o hea ofthe machine.`

2. The herein-described process for resists in collecting the stock from'the White Water, extracting Water stock to vreduce it to any degree of density desired with relation to the condition of the stock fed at the head of the machine, and returning the pulp' so collected and condensed tothe head of the. machine.

3. Theherein-described process 'for rey claiming stock from White Water Whiclrconsists in straining the White l'ously collecting the stock from this -White l Water, and constantly reducing the stock` so l collected to a degree of density deiinitely re l lated to the condition of the stock fed at the head of the machine, and returning the pullp t e machine, substantially as described.

ln testimony whereof l affix my signature in presence of two Witnesses.

, HOl/VARD PARKER. Witnesses:

(LW. CHANDLIN, CHAS.' A. MORRISON.

the ulp so collected and condensed'to the` Water7 continu- Y claiming stock from White water which con- Jfrom f the collected 

